Chili Spiced Cheesy Hasselback Potatoes

good baking potatoes, thoroughly scrubbed (I used these pretty Idaho potatoes)

olive oil for rubbing the skin of each potato (maybe a teaspoon per potato, plus a little more to go in between the slices)

cornstarch

chili powder

red pepper flakes to taste (I like spice!! I used 1/2 teaspoon)

cumin

garlic powder

spicy grill seasoning (I like McCormick Grill Mates Montreal Spicy Steak Seasoning)

cheese, divided (1/8 cup per potato)

green onions to garnish (AND sour cream if you like!!)